Testing device



Patented Mar.r 30,` 1926.

y 1,578,671 PATENT ortica.

FREDERICK J. M ARTIN, 0E NEW YORK, N. AssIGNoR'To WESTERN ELECTRICCoI/L RANY, INCORPORATED, 0E NEW YORK, NY., v1AcoRPoRATIoN oF NEWYCRK.

y TESTING DEVICE.

Application mea June 19, 1923. serial N.' 646,314.9.l

To all 107mm t may concern.' f Be it known that I, FREDERICK J; MARTIN, a citizen of the United States, residing at New York, in the county of New York, Statev of New York, have invented certain new and usefulK Improvements in Testing Devices, "of .which thev following yis a fulhfclear, concise,

and exact description. f

This invention relates to testing devices v and more vices.

In* the installation of telephone exchanges,

it is necessary that all circuits andequipf ment within the exchange be tested for electrical defects such as opens, short-circuits, reverses,'etc., before the exchange opened Vforlpublic service, in order to obviate the necessity Jfor. tearing out defective circuits and apparatus lafter the exchange has been put into fuse. In the manual ltype exchanges, incoming subscribers lines and incoming trunks are ordinarily accessible vto a plurality of operators by virtue of the fact that the lines or trunks terminate at differ-4 ent operators positions.

' It is well known in the telephone art that incoming'trunks and subscribers" lines ter minate at an exchange in a plurality oi separate terminals, for example thetip, ring and sleeve terminals which'are electrically conrnected tol corresponding tie vorV multiple wires, each tie wire interconnecting a pair of liketerminals ot several jacks. g

It is an object of this invention to detect andlocate unstandard conditions in electrical circuits, and more specifically in the mul# rality of relays, which operate automaticalh7 to successively complete electrical circuits through the tip, ring and sleeve conductors in such a mannerv that if any `orall otthese conductors are `open the presence and location of such anunstandard condition is manifested in a signal.

The Ainvention will be readily understood I from the, following detailed' description made with reference to the accompanying drawing in which: f v

Fig. l shows a multiple jack set and the ily, discernible'. particularly to circuit testing decircuiti-will be Vestablished for relay 14 which testing circuit fwherein the'locationjof an unstandardcondition is determined by' the manipulation ofa pair of keys `or V4push buttons, and l, Y ,l l Y Fig.` 2,--,s'hows a testingcircuit wherein a signalrindividual to each circuit beingv testedis provided, thereby rendering the 'locaf tion of an' unstandard condition more read- In Fig. lthe tip,` ringand sleeve multiple yconductors 5, 6 and 7 respectively, of an'incoming line are ,shown` connected -toA their respective contacts otjacks'S, 9and 10.-

In testing the jack multiple forv opens, the procedure is asl follows: AThe plug 12vis inserted ifntojack 10 and yplug 13 into'jack 9. l. If the ring conductor or multiple ywire 6 and the ringcontacts of vjacks 10 and 9 are'electrically continuous, a

maybe traced'rom'thejnegative pole of' battery 15,- winding of relay 14, ring 'conf tacts'o plug 13 andjack 9, ring conductor 6, ring contactsof. jack 10 andjpl'ug 13` to the 'positive pole ofibatteryf-l. Relay 14 energizes in this r,circuit and in attracting .its armature establishes a circuitlfor relay 16. Assuming that the sleeveconductor 7 and the sleeve contacts of jacks 10 Vand 9 are elec-VV trically continuous, relay y16 operates "in a circuit which may ^be tracedv from thefnegative kpole ot'battery 17, front contact and armatureof 'relay 14, winding of relay 16,

sleeve contacts of plug 13 vand j ack 9,\sleeve conductor 7, sleeve contacts of iack 10 and ing. the tip conductor `5 Vand the tip contacts lof jacks 10 and 9 vare electrically continuous.

eii'ects they actuation of relay 18-in a circuitl negative pole of battery ,19, front Contact yand-armature of relay 16', winding of relay 18, tip contactsfof plugs'l and jack9`, tip conductor 5, tip contacts of `iack 10 and plug' 12 to thepositivepoleof-battery v19. Relay vr plug 12-tovthe positive pole of battery "Relay 16 operates in this circuit and`,-'assum which maybe traced as follows from'A the 18 inoperating establishes/an obviousciri cuit for the buzzer QOwhich gives Iforth an 'audible tone; From this fdescription'itfv-is l, l

evident thatywhen a tester inserts ythell two plugs 12 and 13 into two multipled jacks and the buzzer 20 operates,`he knows'that the wires and contacts included between the jacks employed 4are respectively electrically v continuous.y i

The failure of the buzzer k2O to operate upon the insertion of plugs 12 and 13 into two jacks such as 10rand 9 will indicate the ,presence of trouble in some one or alll of the three circuits (tip, ring and sleeve) and the tester proceeds to locate the trouble. The key or push-button 21 is depressed whereupon the heretofore traced circuit for relay 16 is established, except that the contacts of key 21 arc substituted for the contacts of ring relay 14, should-said relay 16 have failed to operate when plugs 12-and 18 were inserted into jacks 1() and 9 respective.- ly. If the sleeve circuit is electrically continuous or devoid of defects, relay 16 will operate, and as described heretofore, will establish a circuit for the tip relay 18 which in the event that the tip circuit Vis also intact will cause the operation of buzzer 20. Therefore, if the insertion of plugs 12 and 13 into jacks 10 and 9 respectively fails to operate the buzzer 20 and a subsequentactuation of key 21 causes the buzzer to operate, the tester knows that the open exists in the ring circuit.

If,l after depressing the key or button 21, the -buzzer fails` to respond, the key 21 Vis released and key 22 depressed. Upon the actuation of key 22, should the buzzer respond, the tester knows that the tip circuit is intact and the trouble exists in either or boththe ring and sleeve circuits. f Key 21 is then depressed, thereby completing a circuit for relay 16 independent of the contacts of relay 14. If in this case the buzzer operates, the trouble lies in the ring circuit and if the buzzer fails to operate the trouble ywill be found in the sleeve circuit.

lFrom the foregoing description, it is apparent that there is more or less mental action required to determine, yby the process of elimination, the exact location of the unst'andard conditions. In Fig. 2, signal lamps 30, 31 and 82 are provided whereby the tester may seen at a glance in which circuit the trouble exists. If upon the insertion of plugv12 and 13 into jacks 10 and 9( respectively all the circuits are intact, the lamps 30, 31 and 82 will "be illuminated and the buzzer l2O operated. The insertion of the plugs and the failure of any lamp to light would indicate trouble in the ring circuit including relay 14:', since this relay controls the operation of all relays in the testing system. If lamp 30 is illuminated and lamps 31 and 82 are not lighted, key 21 is depressed and if lamp 31 thereupon failsv to light, the tester knows that the sleeve circuit is open. Y The nating in as many terminals at a plurality of points, a plurality of electromagnetic devices, means for associating each of said devices with a different one ofthey terminals of said line at several points, a signaling levice. associated with one of said electromagnetic devices, the means for associating the electromagnetic devices with the telephone line being arranged so that the successive operation of saidv devices effects the o )eration of the signaling device.

2. In a testing system, a jack having tip ring .and sleeve terminals, a second jack having similar terminals.I wires connecting .like terminals of said jacks, a plug for each of said jacks having corresponding ytip ring and sleeve *.termiiials,` a.' signaling device` associated with the tip terminals of said plugs, and means associated with the tip,

ring and sleeve .terminals of said plugs and responsiveV to the association of said plugs with said jacks for effecting the operation of said signaling device, if a standard confor detecting the presence of an unstandard condition in theco'rresponding ack circuits.

4. In a testing system, a plurality of multiple jacks, a source of current for each of the type of contacts of said jacks, plugs for interconnecting said -jecks and associating each of said current 'sources with their respective type of jack contacts,tie wires connecting the contacts of each type in said jacks separately, an electromagnetic device for each of said type of contacts, a signaling` device responsive tothe association of 'said plugs with said jacks, the response thereof depending upon a standard condition of each of said tie wires and their corresponding jack' contacts and a subsequent successive operation of said electromagnetic devices, and manually operable means for the corresponding 1- ioo effecting the operation of said signaling device should a break occur in any of said tie wires or between any of said tie wires and its associated liack contacts.

5. In a vtesting system, a plurality f of multiple jacks, plugs for interconnecting said jacks, a signaling-.device foreach type of contacts of said jacks, lmeans.` forisuccessively operating said devices upon insertion of 'said plugs into said jacks, lthe actuation 'of said means depending upon the standard condition of said multiple jacks, and manually operable means for eifecting the operation of the remaining signaling devices should said first mentioned means fail to operate due to the failure of operation of one of said devices upon insertion of said plugs into said jacks.

6. In combination, a plurality of jacks, multiple Wires Connecting the terminals o said jacks, and a ltesting device comprising a train of relays, a. pair of plugs for connect-ing the relays to the jacks, and means for indicating the standard condition of the jacks and multiple Wires.

7. In a testingrsystem a plurality of circuits to be tested, a train or relays,a circuit for each oi' said relays so arranged that.tl1e operation of one relay closes the circuit for a. 'succeeding relay in said train, a plurality of manual connecting terminals for connectl to be tested are all in a standard condition.

8. In combination, a plurality of jacks, multiple Wiresl connecting like terminals of said jacks, a device for testing the multiple connections between any two of said jacks 'comprising a train otrelays operating automatically 1n response to the connection of' 'the device to two of said Jacks, and means controlled by. 'said relays for indicating the standard conditionof ,said multiple Wires.

In Witness whereof, I hereunto subscribe my name this 14th day of June A. D., 1923.

V,FREDERICK J. MARTIN. Y 

